MRI: Acquisition of a Multi-Sensor Core Logger, Pycnometer, C:N Analyzer, and Freeze Dryer for use in Lake and Paleoclimate Studies at Middlebury College

这笔主要研究仪器(MRI)基金将用于购买设备，用于米德尔伯里学院地质学系的古湖泊和古气候研究，该学院是一所本科院校。将购买的具体设备包括碳/氮(CN)分析仪、比重瓶、冷冻干燥机和取芯系统。CN分析仪将用于测量湖泊沉积物样品中陆生和水生有机质的相对贡献，并确定土壤中有机质的组成和分解程度。比重瓶将用于对泡状沉积物样品进行准确的体积密度测定。冷冻干燥机将用于准备用于碳/氮分析的样品，用于使用其他现有设备进行生物成因二氧化硅和矿物磷分析，以及用于干燥样品以便稳定存档。这些仪器将支持地质系三名教员的研究和研究培训方案，包括根据湖泊和海洋沉积档案中记录的替代物研究晚第四纪古气候，以及研究气候对土壤发育的控制。

0922940MunroeFunds from this Major Research Instrumentation (MRI) grant will support the acquisition of equipment to for use in paleolimnology and paleoclimate studies in the Geology Department at Middlebury College, an undergraduate institution. Specific equipment to be acquired will include a Carbon/Nitrogen (CN) analyzer, a pycnometer, a freeze-dryer, and a coring system. The CN analyzer will be used to gauge the relative contribution of terrestrial and aquatic organic matter in lacustrine sediment samples, and to determine the makeup and extent of decomposition of organic matter in soils. The pycnometer will be used to make accurate bulk density determinations for vesicular sediment samples. The freeze-dryer will be used to prepare samples for carbon/nitrogen analysis, for biogenic silica and mineral phosphorous analysis using other currently available equipment, and for drying samples for stable archiving. The instruments will support the research and research training programs of three faculty members in the Department of Geology including studies of late Quaternary paleoclimate based on proxies recorded in lacustine and marine sedimentary archives and studies of climatic controls on soil development.